You shouldn't handle them until about 1-2 days after they're born. It stresses the mom and makes her very apt to reject the babies. How old is the mom? She can't be more than 3-4 months old if I remember the litter she came from.

Probably why your hairless female only raised 3 babies the first time and 2 the second. Didn't produce enough milk and was stressed out.

But that's just my 2 pennies.